I have the same problem as Peggy. I ran the .bat file in the command prompt and it indicates my java_home environment variable is not set. I've set it correctly and it still doesn't run. Using the windows 7 64bit file. 2.0.3. fixed it. has to do with the version of Java you are running. Likely you have 64 bit machine, running 32 bit java. download the 32 bit version of gduplicatefinder and then set your environment variable to the (x86) dir for JAVA_HOME.
Using Windows 7/64bit. Double clicked FileDuplicateFinderUI.bat. Command Prompt briefly opens, but nothing else happens. No "application screen" ever appears.
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